Giacomo Jaquerio (c. 1375 – 1453) was an Italian medieval painter, one of the main exponents of Gothic painting in Piedmont.
For the princes of Acaja, he frescoed the castle of Turin (the current Palazzo Madama), but his work there has been lost.
Also attributed to Jaquerio are two tables with the Stories of St. Peter in the Museo Civico d'Arte Antica in Turin (c. 1410) and a miniature of the Crucifixion (c. 1420) in the Aosta Cathedral Museum.
As usual in the pictorial workshops of that era, miniature works must have also been part of Jaquerio's production.
He unanimously attributed a full-page Crucifixion (about 1420) in the missal of Bishop Oger Moriset conserved in the Treasure Museum of the Cathedral of Aosta.